Rattanakosin came into being when King Rama I ascended the throne in 1782. He decided to establish the new capital on the east bank of the Chao Phraya River for better security from Burma. King Rama I was determined to build a new capital to revive the glory and splendor of old Ayutthaya. The new capital was proclaimed and hence began the Rattanakosin era or Bangkok period under the glorious reign of the Chakri Kings. King Rama I choose a site just north of Wat Pho an old 17th century temple. With the Chao Phraya on the west and the Lod Canal on the east, the new capital was far more defensible. In accordance with Thai customs, the first task was laying the foundation pillar for the new city. The City Pillar Shrine or Sao Lak Muang was established on 21 April 1782. Later King Rama IV, an avid astrologer, felt that a more auspicious location was required. The shrine was moved to the present location on 5 December 1852. Construction of the Grand Palace commenced on 6 May and King Rama I occupied the royal residence on 13 June. Hundreds of boatloads of rubble were shipped from the ruins of Ayutthaya to build the city walls and public buildings of Rattanakosin. At the same time, the Temple of the Emerald Buddha or Wat Phra Kaeo was constructed and completed in 1784. The Emerald Buddha was brought across the river from Wat Arun and installed in the new temple in the same year. Within the walls of the Grand Palace grew a self-contained city that held the seat of government and religion. It was the pride of the Chakri dynasty and Rattanakosin, the city that rose to glory from the ashes of Ayutthaya.